The V8s are good. I've had 2 pulleys/bearings go bad. The second failed completely, dropping the aux belt and damaging the timing cover. If you hear any weird noises from the engine bay, check your pulleys.
They're also not as bad on fuel as you'd expect. I've regularly seen 25mpg+ on a good run.
ABS modules and siren modules always fail, but are relatively cheap & easy to replace. Alternators also seem to be a weak point and are _really_ awkward to get to.